41 lines
1.4 KiB
Bash
41 lines
1.4 KiB
Bash
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#!/bin/bash
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# 生产数据盘健康检查。
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# 生产 server/data 当前是指向外接盘的符号链接；若磁盘未挂载，
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# 启动服务会把数据写到错误位置或直接失败，因此在启动前明确阻止。
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set -euo pipefail
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ROOT="$(cd "$(dirname "$0")/.." && pwd)"
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DATA_LINK="$ROOT/server/data"
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MIN_FREE_GIB="${YAWAN_MIN_FREE_GIB:-100}"
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if [ ! -L "$DATA_LINK" ]; then
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echo "storage check failed: $DATA_LINK is not a symlink to the external data disk" >&2
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exit 2
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fi
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TARGET="$(readlink "$DATA_LINK")"
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if [ "${TARGET#/}" = "$TARGET" ]; then
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TARGET="$(cd "$(dirname "$DATA_LINK")" && cd "$(dirname "$TARGET")" && pwd)/$(basename "$TARGET")"
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fi
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if [ ! -d "$TARGET" ]; then
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echo "storage check failed: external data path is unavailable: $TARGET" >&2
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exit 2
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fi
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# df -Pk reports available KiB in column 4. Keep arithmetic in KiB to avoid
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# locale-dependent human-readable output and require at least 100 GiB free.
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AVAILABLE_KIB="$(df -Pk "$TARGET" | awk 'NR==2 {print $4}')"
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case "$AVAILABLE_KIB" in
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''|*[!0-9]*)
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echo "storage check failed: cannot read free space for $TARGET" >&2
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exit 2
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;;
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esac
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MIN_FREE_KIB=$((MIN_FREE_GIB * 1024 * 1024))
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if [ "$AVAILABLE_KIB" -lt "$MIN_FREE_KIB" ]; then
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echo "storage check failed: $TARGET has ${AVAILABLE_KIB} KiB free; require ${MIN_FREE_GIB} GiB" >&2
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exit 3
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fi
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echo "storage ok: $TARGET has ${AVAILABLE_KIB} KiB free (minimum ${MIN_FREE_GIB} GiB)"
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